Selective remote control



-$ Y/VCV/RO/VOJS MOTOR.

June 4, 1940. w. KOENIG SELECTIVE REMOTE CONTROL Filed Dec. 21, 1937 A33 /1 7 arr-wen SWITCH OFF- NORM/1L W a ATTORNEYS l/V VE N TOR PatentedJune 4, 1940 I 23.3358 SELECTIVE REMOTE CONTROL Werner Koenig, Lucerne.Switzerland, usignor to Landis .2 Gyr, A-G., Zug, Switzerland, acorporatlon of Switzerland Application December 21, m1, Serial No.1,953In Switzerland December 24, 1936 3 Claims.

The invention relates to a receiving device for a remote control systemconnected to an alternatin'g current network and designed to control oreffect definite operations, and more particularly to such receivingdevices controlled by a transmitter, and wherein the selection orcontrol of the different operations is determined by the length of timebetween two interruptions of the alternating current network.

Objects and advantages of the invention will be set forth in parthereinafter and in part will be obvious herefrom or may, be learned bypractice with the invention, the same being realized and attained bymeans of the instrumentalities and combinations pointed out in theappended claims.

The invention consists in the novel parts, constructio arrangements,combinations and improvements herein shown and described.

The accompanying drawing, referred to herein and constituting a parthereof, illustrates one embodiment of the invention, and together withthe description, serves to explain the principles of the invention.

Figures 1 and 2 show two constructional forms of the invention, whereina synchronous motor is employed as the driving mechanism.

Receiving devices embodying the invention are applicable to the remotecontrol of counting mechanisms of electric multiple tariff meters,

the switching-on and off of lighting networks,

the synchronization of clocks, and are also applicable to the'control ofmany other kinds of operations. l

In accordance with the invention a contact arm of a contact selector isdriven after the first interruption of the circuit by a drivingmechanism running at a constant speed, making a quite definite motionand held without potential,

by means of a contact relay energized by the network potential from anadjustable point of the selected length or period of time, and receivesI potential after the second interruption of the circuit. The contactselector can be connected through its contact arm and through a backcontact of the relay (i. e., a contact on which the movable tonguenormally rests) tor of the network, and the device to be controlledconnected to at least one selector contact of the relay corresponding tothe associated length or period of time between two interruptions. Thedriving means for the contact selector may be a synchronous motor,oil-normal, or restoring switch controlled by the contact selector. Thewinding of the contact relay may be connected on one side to oneconductor of the network and on the outer side through its operatingcontact to the other network conductor, and also from time to time to sothat contact of the contact selector that is just to one conducwhich. iscontrolled by an.

ahead of a contact connected to the device to be controlled; or thiscontact relay may operate with delayed attraction, the winding of therelay being connected directly to the network.

Referring now to the exemplary embodiment of Fig. l, I is the contactselector of the receiving device; contact arm 2 is connected to a backcontact 3 of a relay 4; the initial contact 5 is connected on one sidethrough oil-normal switch I to one network conductor A and on the 1.other side through an excitingwinding 6 of a synchronous motor I to thenetwork conductor B; contacts 9 to II are connected to winding I2 and toa holding contact I3 of the relay 4; also contacts I4, I5 are eachconnected through a winding I6, II of a tilting relay III to networkconductor B. A movable contact I9 of relay 4, coacting with holdingcontact I3 and back contact 3 and controlled by winding I2, is connectedto network conductor A. Tilting relay I8 controls a change-over contactarm 24 coacting with contacts 22, 23.

In the diagram of connections shown in Figure 1 it is assumed thatnetwork A, B is interrupted. Synchronous motor 1 and consequently alsocon- 25 tact selector I are then at rest. On switching in thealternating current network A, B circuit A, I9, 3, 2, 5, 6, 15 receivescurrent. Synchronous motor I is thereby set in operation and will startcontact arm 2 of contact selector I rotating. Shortly after synchronousmotor I is started the off-normal switch 9 is closed, so that the supplyof current to winding 6 of synchronous motor I is now effected throughthis switch. As soon as contact arm 2 comes on to contact 9, relay 4 is35 energized through circuit A, I9, 3, 2, 9, I2, B. Its movable contactI9 is thereby raised from contact 3, and brought into connection withholding contact I3. Thus primarily a holding current circuit A, I9, I3,l2, B is completed for relay 4, so that 40 the latter remains energizedeven when contact arm 2 slides away from contact 9. In the second placecontact arm 2 is now.without potential.

As soon as contact arm 2 reaches contact I4, a short second interruptionof network A, B is 45 effected from the transmitter (not shown). Therelay 4 is therefore de-energized, whereby movable contact I9 drops andcomes into engagement with contact 3. After the switching in again ofthe network A, B contact arm 2 of con- 50 tact selector I again receivespotential. Since the arm 2 is still on contact I4, winding I6 of tiltingrelay I8 is energized. The change-over contact arm 24 is consequentlymoved from contact 23 and connected to contact 22. Thus the conductorconnected to change-over contactjarm 24 is connected to the conductorconnected to contact 22. For example, by this actuation of the tiltingrelay l8 the change over of the counting 50 mechanism of a multipletariff meter to low tarifl' can be effected.

The relay 4 is again energized, contact arm 2. of contact selectorcontact I0. Movable contact I9 is attracted, whereby contact arm 2 isagain without potential. Therefore, since there is no interruption ofthe network A, B, winding II of tilting relay I8 is not energized whencontact arm 2 comes on to contact I5. On reaching zero position of thecontact arm 2, the off-normal switch 8 is again opened and thesynchronous motor 1 thereby stops. Since the network remains switchedin, relay 4 will still hold movable contact I9 on holding contact I3.

from high When the next interruption of the circuit is effected from thetransmitter, movable contact I9 will drop from holding contact I3 andengage contact 3. As the two circuit interruptions are only momentaryand of extremely short duration, the synchronous motor will easily coastby during the interruption of power and continue to run. At this point,it may be stated that the subject matter of this invention is used inpower circuits where the currents carried are not too heavy to renderthe system impractical. After this first interruption synchronous motor1 is energized and therewith off-normal switch 8 is closed. Contact arm2 is now turned by the synchronous motor I and will finally reachcontact 9, whereby relay 4 is energized and will remain energized by theclosing of the holding contact I3. Contact arm 2 is then again withoutpotential. When the second short interruption of the network A, B iseifected on the arrival of contact arm 2 on contact I5, relay 4 is againdenergized, so that movable contact I9 comes into engagement with backcontact 3. On the restoration of the network potentiaLwinding I! of thetilting relay is now energized. The changeover contact arm 24 of tiltingrelay I8 is then brought on to contact 23. The counting mechanism of themultiple tariff meter is now changed over from low to high tariff. Assoon as contact arm 2 comes into engagement with contact II, relay 4 isagain energized. It then remains energized up to the next interruptionof the network A, B, and contact arm 2 remains without potential. In thezero position, contact arm 2 of selector I opening of the Any accidentalinterruptions of network A, B after restoration of the network potentialresult in nothing more than idle rotation of contact arm 2. If forexample, an interruption of network A, B occurs after the switching inagain thereof, contact arm 2 is set in rotation. As soon, however, as itarrives on contact 9; relay 4 which was de-energized on the interruptionis again energized, and thereby contact arm 2 is rendered withoutpotential. In the sliding of the contact arm 2 on to contacts I4, I5 noenergization of windings I6, I 1' of tilting relay I8 can therefore takeplace. It may then happen that just at this moment a furtherinterruption of network A, B occurs of a duration which is equal to orless than the selected interruption. This is however not to be assumed,and under practical operating conditions rarely, if ever, happens.

The constructional form according to Figure 2 corresponds essentially tothe arrangement according to Figure 1. In Fig.2, however, instead of therelay with an automatic holding contact,

aaoaesa whereupon the I comes on to tors A, B.

a relay with .delay a relay of this kind is employed, it is unnecessaryto connect contacts 9 to I I of contact selector I to winding I2 and toa contact I3 of relay 4 (Figure 1) Insuch case it is possible to arrangethe remote control system for a larger number of.remote controlledoperations than when receiving devices according to Figure 1 areemployed. The winding I2 of relay 4 is here connected directly acrossthe two network conduc- On the restoration of the network'potentialafter interruption, movable contact I9 of relay 4 is not-immediatelyremoved 'from contact 3, but only after atime, which insures withcertainty the starting of synchronous motor 'I and closure of theoff-normal switch 8. Any further description of the method of operationof the arrangement according to Figure 2 is not necessary, since the.latter corresponds essentially to that of the arrangement of Figure 1.

action is employed. when.

The invention in its broader aspects is not.

limited to the specific mechanisms shown and described but departuresmay be made therefrom within the scope of the accompanying claimsWithout departing from the principles of the invention and tages.

WhatI'claim is: '1.,A.circuit selector associated with a normally closedpower supply network and responsive to the period of time elapsingbetween two successive momentary interruptions of the network,comprising 'a constant speed electric motor to be energized from thenetwork, a plurality of contacts, a wiper driven by said withoutsacrificing its chief advan-.

motor and passing successively over said 0011- tacts, a relay,connections whereby the relay is energized from the network when thenetwork is closed, connections from the network to the motor forinitially energizing the motor and moving the wiper from initialposition, said connections including the wiper, one of the selectorcontacts insaid initial position and a back contact of the relay, meansfor connecting the motor to the including the back contact of the relay,the wiper and respective other of said will accomplish selection.

2. The combination as claimed in claim 1, said means for delaying theopening of the motor connections through the back contact of the relayincluding a circuit established through the back contact of the relay,the wiper, another 3. The combination as claimed in claim 1, wherein thedelaying of the opening of the motor connections through the backcontact of the relay upon reclosure of the network to allow the motor tomeanwhile move the wiper from its initial position, is accomplished bymaking said relay of the delay or retarded action type.

WERNER KOENIG.

contacts whereby the second momentary opening of the network

